一种均相稀土催化剂反应过程的初步研究  

PRELIMINARY STUDY ON THE REACTION PROCESS OF A HOMOGENEOUS RARE EARTH CATALYST

作　　者：逄束芬[1] 谢德民[1] 孙涛[1] 嵇显忠 单成基[1] 杨继华[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《应用化学》1990年第3期85-88,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金

摘　　要：稀土元素组成的Ziegler-Natta型催化剂,其相态常受体系中Cl/Nd克原子比所制约,仅在Cl/Nd≤2克原子比时呈均相态。最近发现一类新型催化体系,可在较宽Cl/Nd下保持均相态,如以Me_2SiCl_2(二甲基二氯硅烷),烯丙基氯等为第三组份所组成的体系。A homogeneous rare earth catalyst comprising neodymium octonate, diisobutylaluminumhydride and dichlorodiphenylsilane[Nd(Oct)_3 -HAl(i-Bu)~2 -φ_2SiCl_2] for stereospecific polymeri-zation of butadiene was selected to study the action of the third component in the homoge-neous system. Investigation on reactions between Nd (oct)_3, HAl(i-Bu)_2 and φ_2SiCl_2 bymeans of NMR(~1H and ^(13)C spectra)showed that the tφ_2SiCl_2,unlike alkyl aluminum chloride,does not react directly with Nd-salt, suepplying the chlorine atom, it reacts first withHAl(i-Bu)_2, giving φ_2SiH_2 and Al(i-Bu)_2Cl, and the latter affords the Nd-salt chlorineatom necessary for forming an active catalyst.Some experimental facts found in polymeriza-tion of butadiene using the catalyst were explained by the reaction path mentioned above.

关 键 词：稀土催化剂 丁二烯 均相聚合 

分 类 号：O632.12[理学—高分子化学]